arm64: tools: Add __ASM_CPUCAPS_H to the endif in cpucaps.h

Anshuman suggested this.
Suggested-by: NAnshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: NMark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20210513151819.12526-1-broonie@kernel.orgSigned-off-by: NCatalin Marinas <catalin.marinas@arm.com>

arch/arm64/tools/gen-cpucaps.awk

@@ -31,7 +31,7 @@ BEGIN {
 END {
 	printf("#define ARM64_NCAPS\t\t\t\t%d\n", cap_num)
 	print ""
-	print "#endif"
+	print "#endif /* __ASM_CPUCAPS_H */"
 }
 
 # Any lines not handled by previous rules are unexpected